Resonant fluidization of silty soil by water waves

Foda, Mostafa A.; Tzang, Shiaw-Yih

doi:10.1029/94jc02040

Cited by 65 publications

(12 citation statements)

References 10 publications

(3 reference statements)

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“…Investigations of Faraday resonance have not been limited only to surface water waves. For example, Foda and Tzang 11 and Kumar 12 both studied the Faraday resonance of thin viscoelastic layers. Umbanhowar et al 13 have shown that Faraday resonance can excite three-dimensional standing ''waves'' in a pure granular medium as well.…”

Section: B Parametric Instabilitymentioning

confidence: 99%

Transient and steady-state amplitudes of forced waves in rectangular basins

Hill

2003

Physics of Fluids

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A weakly-nonlinear analysis of the transient evolution of two-dimensional, standing waves in a rectangular basin is presented. The waves are resonated by periodic oscillation along an axis aligned with the wavenumber vector. The amplitude of oscillation is assumed to be small with respect to the basin dimensions. The effects of detuning, viscous damping, and cubic nonlinearity are all simultaneously considered. Moreover, the analysis is formulated in water of general depth. Multiple-scales analysis is used in order to derive an evolution equation for the complex amplitude of the resonated wave. From this equation, the maximum transient and steady-state amplitudes of the wave are determined. It is shown that steady-state analysis will underestimate the maximum response of a basin set into motion from rest. Amplitude response diagrams demonstrate good agreement with previous experimental investigations. The analysis is invalid in the vicinity of the ''critical depth'' and in the shallow-water limit. A separate analysis, which incorporates weak dispersion, is presented in order to provide satisfactory results in shallow water.

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Section: B Parametric Instabilitymentioning

confidence: 99%

Transient and steady-state amplitudes of forced waves in rectangular basins

Hill

2003

Physics of Fluids

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“…, 1991; de Groot & Meijers, 1992; Tzang et al. , 1992; Foda & Tzang, 1994; Foda, 1995; Sekiguchi et al. , 1995; Tzang, 1998; Sassa & Sekiguchi, 1999; Sumer et al.…”

Section: Introductionunclassified

The sequence of sediment behaviour during wave‐induced liquefaction

et al. 2006

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This paper presents the results of an experimental investigation of the complete sequence of sediment behaviour beneath progressive waves. The sediment was silty with d 50 ¼ 0.060 mm. Two kinds of measurements were carried out: pore-water pressure measurements (across the sediment depth), and water-surface elevation measurements. The process of liquefaction/ compaction was videotaped from the side simultaneously with the pressure and water-surface elevation measurements. The video records were then analysed to measure: (i) the time development of the mudline, (ii) the time development of liquefaction and compaction fronts in the sediment and (iii) the characteristics of the orbital motion of the liquefied sediment including the motion of the interface between the water body and the sediment. The ranges of the various quantities in the tests were: wave height, H ¼ 9-17 cm, wave period, T ¼ 1.6 sec, water depth ¼ 42 cm, and the Shields parameter ¼ 0.34-0.59. The experiments reveal that, with the introduction of waves, excess pore pressure builds up, which is followed by liquefaction during which internal waves are experienced at the interface of the water body and the liquefied sediment, the sequence of processes known from a previous investigation. This sequence of processes is followed by dissipation of the accumulated excess pore pressure and compaction of the sediment which is followed by the formation of bed ripples. The present results regarding the dissipation and compaction appear to be in agreement with recent centrifuge wave-tank experiments. As for the final stage of the sequence of processes (formation of ripples), the ripple steepness (normalized with the angle of repose) for sediment with liquefaction history is found to be the same as that in sediment with no liquefaction history.

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“…When the effective stresses between individual grains vanish because of the excess porepressure, the sediment mixture will act as liquid in either a horizontal (shear failure) or vertical direction (liquefaction), leading to a failure of seabed (Zen et al, 1998). The liquefaction can generally be categorized into two types (Sumer and Fredsøe, 2002): the residual or build-up excess pore-pressure due to cyclic shear stresses (e.g., Clukey et al, 1985a;Foda and Tzang, 1994;van Kessel and Kranenburg, 1998;de Wit and Kranenbury, 1996), and the transient or oscillatory excess porepressure characterized by amplitude attenuation and phase lag (e.g., Yamamoto et al, 1978;Nago, 1981;Clukey et al, 1985b;Tzang and Ou, 2006;Tzang et al, 2009). Another important physical phenomenon during the wave travelling over the seabed is the attenuation of wave height, which is mainly due to the energy loss induced by wave-seabed interaction (Putnam, 1949).…”

Section: Introductionmentioning

confidence: 99%

“…They investigated the oscillation of the transient pore pressure in the sandy seabed and the transient liquefaction caused by the upward seepage force under wave trough. Silt and clay were also utilized and the build-up of residual pore pressures leading to the residual liquefaction was observed in several experimental studies (Clukey et al, 1985a;Foda and Tzang, 1994;de Wit and Kranenbury, 1996;van Kessel and Kranenburg, 1998;Zheng et al, 2007).…”

Section: Introductionmentioning

confidence: 99%